暗区相互作用对结构生长的影响
Effects of dark sectors' mutual interaction on the growth of structures
摘要：
我们提出了一个一般的形式主义来研究暗能量扰动和暗扇区之间的相互作用时，暗物质扰动的增长。我们发现，结构的增长的动力学稳定性取决于暗扇区之间的耦合类型。通过采取适当的耦合保证结构的稳定增长，我们观察到暗扇区相互作用对暗物质微扰增长函数的影响超过了暗能量微扰的影响。由于相互作用的影响，生长指数可以在观测灵敏度范围内与没有相互作用的值不同，这为通过对大型结构生长的未来观测来揭示暗扇区之间的相互作用提供了可能性。
英文摘要：
We present a general formalism to study the growth of dark matter perturbations when dark energy perturbations and interactions between dark sectors are present. We show that dynamical stability of the growth of structure depends on the type of coupling between dark sectors. By taking the appropriate coupling to ensure the stable growth of structure, we observe that the effect of the dark sectors' interaction overwhelms that of dark energy perturbation on the growth function of dark matter perturbation. Due to the influence of the interaction, the growth index can differ from the value without interaction by an amount within the observational sensibility, which provides a possibility to disclose the interaction between dark sectors through future observations on the growth of large structure.
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